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06-20-2011, 10:36 PM
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#1 |
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Registered User
 
Join Date: May 2009
Location: Walla Walla, WA
Posts: 327
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Rear diff ID
I looked everywhere and can't seem to find much out about my rear end. It has 14 bolts. It's in a 72 BB TH400 3/4 ton pickup. Any help would be great.
Last edited by rbagley; 06-20-2011 at 10:37 PM. |
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06-20-2011, 10:52 PM
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#2 |
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Registered User
Join Date: May 2009
Location: Walla Walla, WA
Posts: 327
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Re: Rear diff ID
Also, it's a full floater. Is there any way to tell what the gear ratio is from the numbers in the pictures or do I have to do the old lift one tire and spin trick?
Last edited by rbagley; 06-20-2011 at 10:53 PM. |
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06-21-2011, 10:08 AM
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#3 |
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Registered User
Join Date: May 2009
Location: Walla Walla, WA
Posts: 327
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Re: Rear diff ID
Bump. Does anyone know if it could be correct to the truck?
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06-21-2011, 12:11 PM
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#4 |
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Registered User
Join Date: Mar 2009
Location: norman okahoma
Posts: 269
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Re: Rear diff ID
It looks like a corporate 14 bolt to me. I don't know when they started using but I know1973 - 1987 3/4 and 1 tons had them.
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The TEAL GMC build thread is HERE 1972 GMC SWB 454 oval ports TH400 fastest 1/4 mile time so far 13.05 @ 104 If you think you have too much horsepower you obviously have a traction problem ! Last edited by dougminton; 06-21-2011 at 12:11 PM. |
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06-21-2011, 12:41 PM
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#5 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,858
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Re: Rear diff ID
It would have come with a Dana60 with 3.54:1 ratio. That looks like a 14-bolt from what I can see,which would have been swapped-in at some point. The Dana 60s have a drain plug in the lower right of the cover,doesn't dip in the bottom center as much,and has a more defined raised flat area at the ring gear.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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06-21-2011, 02:02 PM
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#6 |
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Registered User
Join Date: May 2009
Location: Walla Walla, WA
Posts: 327
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Re: Rear diff ID
Thanks for the help guys. From what I can find it seems like a stout rear end.
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06-21-2011, 02:20 PM
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#7 |
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Old Skool Club
Join Date: Jun 2001
Location: Benton, AR "The Heart of Arkansas"
Posts: 10,880
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Re: Rear diff ID
Don't know if your rearend has the markings that mine does...and it is just a 12-bolt....but here's the markings that were on the top of the right axle tube.
Only saying this in case yours also has stamped markings.
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Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was. Last edited by ChevLoRay; 06-21-2011 at 02:24 PM. |
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